Auflistung Geochemie, Mineralogie, Petrologie nach Titel
Anzeige der Dokumente 89-108 von 567
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Coupling of diagenetic alterations and mechanical properties of Lower Permian siliciclastic sandstones: a pilot study
(Environmental Earth Sciences, 2021-02-07)Initial detrital composition and authigenic alterations during diagenesis of three sandstone types are related to their mechanical properties. Sandstones were prepared for geotechnical standard tests [density, uniaxial ... -
Cr isotopes in physically separated components of the Allende CV3 and Murchison CM2 chondrites: Implications for isotopic heterogeneity in the solar nebula and parent body processes
(Meteoritics & Planetary Science, 2019-08-12)Chromium isotopic data of physically separated components (chondrules, CAIs, variably magnetic size fractions) of the carbonaceous chondrites Allende and Murchison and bulk rock data of Allende, Ivuna, and Orgueil are ... -
Cryptic metasomatic agent measured in situ in Variscan mantle rocks: Melt inclusions in garnet of eclogite, Granulitgebirge, Germany
(Journal of Metamorphic Geology, 2020)Garnet of eclogite (formerly termed garnet clinopyroxenite) hosted in lenses of orogenic garnet peridotite from the Granulitgebirge, NW Bohemian Massif, contains unique inclusions of granitic melt, now either glassy or ... -
Crystal diffraction prediction and partiality estimation using Gaussian basis functions
(Acta Crystallographica Section A, 2023-02-17)The recent diversification of macromolecular crystallographic experiments including the use of pink beams, convergent electron diffraction and serial snapshot crystallography has shown the limitations of using the Laue ... -
Crystal structure and characterization of magnesium carbonate chloride heptahydrate
(Acta Crystallographica Section C, 2020)MgCO3·MgCl2·7H2O is the only known neutral magnesium carbonate containing chloride ions at ambient conditions. According to the literature, only small and twinned crystals of this double salt could be synthesised in a ... -
Crystal structure of a calcium(II)–pyrroloquinoline quinone (PQQ) complex outside a protein environment
(Acta Crystallographica Section C, 2020-11-05)Pyrroloquinoline quinone (PQQ) is an important cofactor of calcium‐ and lanthanide‐dependent alcohol dehydrogenases, and has been known for over 30 years. Crystal structures of Ca–MDH enzymes (MDH is methanol dehydrogenase) ... -
Crystal structure of human CRM1, covalently modified by 2‐mercaptoethanol on Cys528, in complex with RanGTP
(Acta Crystallographica Section F, 2021-03-08)CRM1 is a nuclear export receptor that has been intensively targeted over the last decade for the development of antitumor and antiviral drugs. Structural analysis of several inhibitor compounds bound to CRM1 revealed that ... -
Crystallization of metastable monoclinic carnallite, KCl·MgCl2·6H2O: missing structural link in the carnallite family
(Acta Crystallographica Section C, 2020)During evaporation of natural and synthetic K–Mg–Cl brines, the formation of almost square plate-like crystals of potassium carnallite (potassium chloride magnesium dichloride hexahydrate) was observed. A single-crystal ... -
Crystallographic analysis of the lattice metric (CALM) from single electron backscatter diffraction or transmission Kikuchi diffraction patterns
(Journal of Applied Crystallography, 2021-05-28)A new software is presented for the determination of crystal lattice parameters from the positions and widths of Kikuchi bands in a diffraction pattern. Starting with a single wide‐angle Kikuchi pattern of arbitrary ... -
Curie Temperatures and Emplacement Conditions of Pyroclastic Deposits From Popocatépetl Volcano, Mexico
(Geochemistry, Geophysics, Geosystems, 2022-08-29)Most pyroclastic deposits of Popocatépetl volcano were emplaced at high temperatures and have similar mafic to more evolved compositions, suggesting a long‐lived, interconnected magma environment. We performed a magnetic ... -
Czochralski growth of mixed cubic sesquioxide crystals in the ternary system Lu2O3–Sc2O3–Y2O3
(Acta Crystallographica Section B, 2021-07-15)Cubic rare‐earth sesquioxide crystals are strongly demanded host materials for high power lasers, but due to their high melting points investigations on their thermodynamics and the growth of large‐size crystals of high ... -
Data reduction for X‐ray serial crystallography using machine learning
(Journal of Applied Crystallography, 2023-01-24)Serial crystallography experiments produce massive amounts of experimental data. Yet in spite of these large‐scale data sets, only a small percentage of the data are useful for downstream analysis. Thus, it is essential ... -
Dating Deep-Sea Sediments With 230Th Excess Using a Constant Rate of Supply Model
(Paleoceanography and Paleoclimatology, 2019)We present a dating method for deep-sea sediments that uses the natural radionuclide 230Th (half-life 75,380 years) in analogy to 210Pb with the constant rate of supply (CRS) model. Using an example from the western Indian ... -
Decoding the complex internal chemical structure of garnet porphyroblasts from the Zermatt area, Western Alps
(Journal of Metamorphic Geology, 2019)Garnet is a prototypical mineral in metamorphic rocks because it commonly preserves chemical and textural features that can be used for untangling its metamorphic development. Large garnet porphyroblasts may show extremely ... -
Deepening the Late Quaternary's Deep Ocean Carbon Mysteries
(Geophysical Research Letters, 2022-07-06)Changes to the carbon content of the deep ocean, the largest reservoir in the surficial carbon cycle, are capable of altering atmospheric carbon dioxide concentrations and thereby Earth's climate. While the role of the ... -
Deformation microstructures - Antarctic Ice from EPICA Dronning Maud Land and artificial creep test Ice
(Univ. Bremen, 2007)Ice, microstructures, subgrain boundaries, recrystallization, flow, deformation. - The primary objective of this thesis is the investigation of microstructures obtained from samples from the EPICA Dronning Maud Land ice ... -
Deformation, CPO, and Elastic Anisotropy in Low‐Grade Metamorphic Serpentinites, Atlantis Massif Oceanic Core Complex
(Geophysical Research Letters, 2021-04-28)Crystallographic preferred orientation (CPO) and the associated seismic anisotropy of serpentinites are important factors for the understanding of tectonic settings involving hydrated Earth´s mantle, for example, at ... -
Denitrification‐Driven Transcription and Enzyme Production at the River‐Groundwater Interface: Insights From Reactive‐Transport Modeling
(Water Resources Research, 2022-08-26)Molecular‐biological data and omics tools have increasingly been used to characterize microorganisms responsible for the turnover of reactive compounds in the environment, such as reactive‐nitrogen species in groundwater. ... -
Detectability of Artificial Ocean Alkalinization and Stratospheric Aerosol Injection in MPI‐ESM
(Earth's Future, 2020-10-24)To monitor the success of carbon dioxide removal (CDR) or solar radiation management (SRM) that offset anthropogenic climate change, the forced response to any external forcing is required to be detectable against internal ... -
Detecting initial aragonite and calcite variations in limestone–marl alternations
(Sedimentology, 2021-05-28)Limestone–marl alternations are commonly used for high‐resolution cyclostratigraphic studies and palaeoenvironmental reconstructions, but diagenetic studies indicate that not all limestone–marl alternations reflect genuine ...